Store changes to recipes

controllers/recipeData.js

@@ -1,5 +1,6 @@
-const Recipe = require("../models/recipe");
-const Merchant = require("../models/merchant");
+const Recipe = require("../models/recipe.js");
+const Merchant = require("../models/merchant.js");
+const RecipeChange = require("../models/recipeChange.js");
 const Validator = require("./validator.js");
 
 module.exports = {
@@ -78,8 +79,52 @@ module.exports = {
             return res.json(validation);
         }
 
+        let changes = [];
+
         Recipe.findOne({_id: req.body.id})
             .then((recipe)=>{
+                for(let i = 0; i < req.body.ingredients.length; i++){
+                    let isMatch = false;
+                    for(let j = 0; j < recipe.ingredients.length; j++){
+                        if(req.body.ingredients[i].ingredient === recipe.ingredients[j].ingredient.toString()){
+                            let difference = parseFloat((req.body.ingredients[i].quantity - recipe.ingredients[j].quantity).toFixed(2));
+                            if(difference !== 0){        
+                                changes.push({
+                                    ingredient: recipe.ingredients[j].ingredient,
+                                    change: difference
+                                });
+                            }
+                            isMatch = true;
+
+                            break;
+                        }
+                    }
+
+                    if(!isMatch){
+                        changes.push({
+                            ingredient: req.body.ingredients[i].ingredient,
+                            change: req.body.ingredients[i].quantity
+                        });
+                    }
+                }
+
+                for(let i = 0; i < recipe.ingredients.length; i++){
+                    let isMatch = false;
+                    for(let j = 0; j < req.body.ingredients.length; j++){
+                        if(recipe.ingredients[i].ingredient.toString() === req.body.ingredients[i].ingredient){
+                            isMatch = true;
+                        }
+                    }
+
+                    if(!isMatch){
+                        changes.push({
+                            ingredient: recipe.ingredients[i].ingredient,
+                            change: -recipe.ingredients[i].quantity
+                        });
+                    }
+                }
+                console.log(changes);
+
                 recipe.name = req.body.name;
                 recipe.price = req.body.price;
                 recipe.ingredients = req.body.ingredients;
@@ -87,7 +132,15 @@ module.exports = {
                 return recipe.save()
             })
             .then((response)=>{
-                return res.json({});
+                res.json({});
+
+                let recipeChange = new RecipeChange({
+                    recipe: response._id,
+                    date: new Date(),
+                    changes: changes
+                });
+
+                return recipeChange.save()
             })
             .catch((err)=>{
                 return res.json("ERROR: UNABLE TO UPDATE RECIPE");

models/recipeChange.js

@@ -6,15 +6,21 @@ const RecipeChangeSchema = new mongoose.Schema({
         ref: "Recipe",
         required: true
     },
-    ingredient: {
-        type: mongoose.Schema.Types.ObjectId,
-        ref: "Ingredient",
-        required: true
-    },
-    change: {
-        type: Number,
-        required: true
+    date: {
+        type: Date,
+        default: Date.now
     },
+    changes: [{
+        ingredient: {
+            type: mongoose.Schema.Types.ObjectId,
+            ref: "Ingredient",
+            required: true
+        },
+        change: {
+            type: Number,
+            required: true
+        }
+    }],
     date: {
         type: Date,
         default: Date.now